Bank draft not cashed from buffalo almost 5 month

[soop]

Hi guys
I send my full document on June 14 adding additional family member which is my wife providing them a bank draft for my wife . I received my 2nd AOR from them after 5 month.but when I checked with bank the draft is not cashed yet. I was wondering that draft is valid for 6 month. Almost going to be 6 month but not yet cashed. I don't know what to do.

Any suggestion

Soop